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Welcome
To The Hydra Site
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Hydra is an OpenMosix∞
cluster made up of sixteen nodes, built
at
IASI-CNR (Istituto di Analisi dei Sistemi ed Informatica IASI-CNR∞).

hydra
is an openMosix
cluster, it was built with
the aim of doing high performance calculation (HPC).
hydra si made up of 16 identical nodes, interconnected by 1Gigabit
ethernet switch. Each node has a P4-3.6Ghz processor and 2G of Ram.
Recently it was splitted into two subclusters, the first one composed
by 12 nodes,
the main cluster
for calculation, and a second made up of 4 nodes for testing.

The
base operating system is Debian
GNU/Linux.
The cluster is structured in such a way that there are 4 masters
and 8 slaves. As you may know there are no master-slave relationship
betweeen openMosix
nodes, but
there are two kind of nodes: UHN
and remote.
We decided to have only 4 UHN,
where the users can login and run their
processes. To monitor the cluster we have installed both openMosixView
and openMosixWebView.

During the
settle up of the cluster I wrote a lot of documentation and
useful scripts, such as a simple queueing program (hydraqueue) to
mange processes
submission on each UHN,
a
useful one to add new users simultaneosly on all the UHN
(addMosixuser).
I have also created a bootable cdrom from the running system, in order
to make simple the setting up of a new node (or the resurrection of a
died node). All of this stuffs are collected and organized in The Hydra documentation
Project,
follow the below link to learn more.